21170460153 has 16 divisors (see below), whose sum is σ = 28469491776. Its totient is φ = 13993052160.

The previous prime is 21170460151. The next prime is 21170460161. The reversal of 21170460153 is 35106407112.

It is not a de Polignac number, because 21170460153 - 2¹ = 21170460151 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21170460153.

It is not an unprimeable number, because it can be changed into a prime (21170460151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99625 + ... + 228617.

It is an arithmetic number, because the mean of its divisors is an integer number (1779343236).

Almost surely, 2^21170460153 is an apocalyptic number.

It is an amenable number.

21170460153 is a deficient number, since it is larger than the sum of its proper divisors (7299031623).

21170460153 is a wasteful number, since it uses less digits than its factorization.

21170460153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129464.

The product of its (nonzero) digits is 5040, while the sum is 30.

Adding to 21170460153 its reverse (35106407112), we get a palindrome (56276867265).

The spelling of 21170460153 in words is "twenty-one billion, one hundred seventy million, four hundred sixty thousand, one hundred fifty-three".